HR7668

Altitude: -31.6° Azimuth: 104.7° Direction: East-South-East

HR7668 is a multiple star in the constellation of Sagittarius.

HR7668 visual magnitude is 6.53. Because of its reltive faintness, HR7668 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR7668:

Color of HR7668 ⬤

Magnitude of HR7668 6.53

Class

VISIBILITY RIGHT NOW

HR7668 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -31.6°
Azimuth: 104.7°
Direction: East-South-East

Celestial coordinates and finder chart of HR7668

HR7668 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7668 are provided in the following table:

Right Ascension J2000 20h 05m 32s

Declination J2000 -33° 00’ 00”

Galactic Longitude 8.38°

Galactic Latitude -29.04°

Constellation Sagittarius

The simplified sky map below shows the position of HR7668 in the sky:

Simplified finder chart for HR7668.

Visibility of HR7668 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR7668 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 123.0° RISE 17:52

Max altitude: 5.5° TRANSIT 20:12

Azimuth: 237.0° SET 22:33

Digitized Sky Survey image of HR7668

The image below is a photograph of HR7668 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR7668 is 0.018 arcsec per year in Right Ascension and -0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7668. The red arrow shows the motion of HR7668 during the next 10000 years (3.00 arcmin in Right Ascension and -3.00 arcmin in declination);

Distance of HR7668 from the Sun and relative movement

HR7668 is distant 936.78 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

Distance (parsec) 287.36 pc

Distance (light year) 936.78 ly

Heliocentric radial velocity -18 km/s

Proper Motion RA 0.018 arcsec/year

Proper Motion Dec -0.018 arcsec/year

Spectral properties of HR7668

HR7668 belongs to spectral class B8

Absolute magnitude -0.76

Spectral Type B8

Color Index (B-V) -0.08

Temperature of HR7668 11247K

The red dot in the diagram below shows where HR7668 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7668. Attribution: Richard Powell / CC BY-SA

HR7668 star system properties

HR7668 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR7668 double sysyem:

Main star magnitude 6.53

Secondary star magnitude 7.53

Magnitude difference 1

Separation 0.4 arcsec

Alternative designations of HR7668

Henry Draper Catalogue HD190306

SAO Catalogue SAO211798

Hipparcos Catalogue HIP98960

Durchmusterung Catalogue CD-3314700

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In Evidence

Other stars in Sagittarius